Blender base



FIG. 1 is a top front perspective view of a blender base showing my new design, the broken line showing of a blender container is environmental only and forms no part of the claimed design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevation view;

FIG. 4 is a right side elevation view;

FIG. 5 is a rear elevation view;

FIG. 6 is a left side elevation view; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a blender base, as shown and described. 